Hands-free navigation of touch-based operating systems

ABSTRACT

Aspects of the present invention allow hands-free navigation of touch-based operating systems. The system may automatically interface with a touch-based operating system and generate hands-free commands that are associated with touch-based commands. Embodiments may utilize motion and/or audio inputs to facilitate hands-free interaction with the touch-based operating system.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application relates to and has the same priority date as thefollowing applications: U.S. patent application Ser. No. 15/390,389,entitled ELECTRONIC DOCUMENT NAVIGATION ON A HEAD-MOUNTED DISPLAY, U.S.patent application Ser. No. 15/390,363, entitled INTERCHANGEABLE OPTICSFOR A HEAD-MOUNTED DISPLAY, U.S. patent application Ser. No. 15/390,380,entitled MODULAR COMPONENTS FOR A HEAD-MOUNTED DISPLAY, and U.S. patentapplication Ser. No. 15/390,375, entitled ARTICULATING COMPONENTS FOR AHEAD-MOUNTED DISPLAY, each of which is hereby incorporated in itsentirety by reference herein.

BACKGROUND

Touch-based devices, such as smartphones, tablets, and laptops, havebecome a ubiquitous aspect of daily life. For example, it is now commonthat a person will organize and conduct social interactions throughapplications on a smartphone or tablet. Further, businesses often relyon touch-based devices to communicate with employees, monitor jobs, andreview project data, among any number of other uses. Touch-based devicestypically run touch-based operating systems (such as Android or iOS),which inherently rely on touch-based inputs to control interaction withthe operating systems. As useful and valuable as these devices are, theyall have the same limitation; at a primary level, they require a user tointeract manually directly with the device.

For example, touch-based operating systems now primarily rely on virtualkeyboards for receiving textual input. Virtual keyboards often haverelatively small buttons where words must be spelled out one letter at atime, which can be time-consuming and impractical for inputting messagesof even moderate length. Some touch-based operating systems providespeech recognition to translate text into words, however, such speechrecognition often requires an Internet connection, which may not alwaysbe available. Further, even if speech recognition is available, it istypically limited to textual input, and touch-based operating systemsprovide limited mechanisms for navigating user interfaces withinapplications and navigating between multiple applications. For example,navigating a multipage document in touch-based operating systemsgenerally requires the user to touch the screen at the scroll bar tonavigate horizontally, or “swipe” the screen to scroll.

However, users may desire (or need) to use these devices during periodswhere manual touch-based interaction is infeasible, difficult, orimpossible. For example, many individuals may not have the ability tointeract physically with touch-based devices, yet need or desire to doso. Additionally, even when a user can physically interact with atouch-based device, environmental restrictions may restrict manualinteractions with devices in a safe or comfortable manner. Further, itmay be desirable to access functionalities of a touch-based device whilea user is engaged in a task that requires the user's hands.

Previous attempts to solve these problems often relied on highlyspecialized, purpose-built devices or processes that provided cumbersomeand inflexible user experiences. Further, previous solutions requiredmodification of source code from existing applications designed fortouch-based operating systems, such that the applications werecompatible with hands-free input sources. It would also be impracticalto modify every touch-based application to facilitate a touch-freesolution. Accordingly, existing solutions were only compatible with afew select touch-based applications. Additionally, prior solutions havefailed to enable interaction with the touch-based operating systemsthemselves, and instead rely on their own operating system. As a result,prior solutions generally required a user to have to learn a brand newoperating environment, rather than enable interaction with existing andheavily-adopted touch-based operating systems.

SUMMARY

This summary is provided to introduce a selection of concepts in asimplified form that are further described below in the DetailedDescription. This summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used as an aid in determining the scope of the claimed subjectmatter.

To address these problems, the present invention is generally directedto systems and methods for providing hands-free navigation oftouch-based operating systems. Further, the aspects described hereinfacilitate hands-free interaction with touch-based operating systems andapplications without requiring modification of source code. That is tosay, aside from implementing the system and/or method described herein,a user is not required to change to a different application or abandon afamiliar touch-based operating system to enjoy the advantages ofhands-free interaction. Additionally, though not required, inembodiments, a user may customize the hands-free navigation to providetailored functionality based on their needs and desires.

Accordingly, aspects of the technology described herein provide for asystem and method that facilitate hands-free navigation of touch-basedoperating systems. In one aspect, the hands-free navigation systemanalyzes a touch-based user interface of a touch-based operating systemto identify touch-based scrolling features, associates the scrollingfeatures with hands-free commands, and presents the touch-based userinterface on a display to the user. Then, as the system is rotated,translated, or otherwise moved in 3D space, the system may detect thosemovements and convert them into touch-based commands in the touch-baseduser interface of the touch-based operating system. In other words, thesystem may convert touch-based scrolling features into motion-basedcommands, detect motion, and convert the motion into scrolling commands.As such, the touch-based operating system may be converted into ahands-free operating system that may utilize motion-based user commands.

In another aspect, the hands-free system analyzes a touch-based userinterface of a touch-based operating system to identify controldialogues (such as icons associated with commands), associates thecontrol dialogues with keyword cues, and presents the touch-based userinterface on a display to the user. Then, the system may process audioinput, identify keyword cues within the audio input, and convert thekeyword cues into the associated touch-based commands in the touch-baseduser interface of the touch-based operating system. In other words, thesystem converts touch-based commands into keyword cues, which whenspoken by the user, may cause the desired command to be executed in thetouch-based environment. As such, the touch-based operating system maybe converted into a hands-free operating system that may utilizevoice-based user commands. To ease user interaction, in another aspect,the system may present keyword cue overlays that are superimposed on thetouch-based user interface. These overlays may provide helpful visualprompts to aid the user in issuing keyword cues to facilitate aselection of the desired control dialogue.

In one aspect, the various hands-free input types disclosed herein maybe used simultaneously or in conjunction with one another. For example,the system may be responsive to both motion-based user commands andvoice-based user commands at the same time. Further, methods areprovided which may facilitate hands-free navigation using motion-baseduser commands, voice-based user commands, and motion plus voice-baseduser commands.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure is described in detail below with reference tothe attached drawing figures, wherein:

FIG. 1 depicts an exemplary computing environment suitable for use inimplementing embodiments of the present disclosure;

FIG. 2 depicts an exemplary hands-free navigation system, in accordancewith aspects hereof;

FIG. 3 depicts the exemplary hands-free navigation system depicted inFIG. 2, in accordance with additional aspects hereof;

FIG. 4A depicts an exemplary motion-based hands-free interaction method,in accordance with aspects hereof;

FIG. 4B depicts an exemplary audio-based hands-free interaction method,in accordance with aspects hereof;

FIG. 4C depicts an exemplary motion- and audio-based hands-freeinteraction method, in accordance with aspects hereof;

FIG. 5 depicts an exemplary method for determining multi-axismotion-based interactions, in accordance with aspects hereof;

FIG. 6A depicts an exemplary user interaction, in accordance withaspects hereof;

FIG. 6B depicts an exemplary user interaction, in accordance withaspects hereof;

FIG. 7A depicts an exemplary method for determining audio-based input,in accordance with aspects hereof;

FIG. 7B depicts an enlarged portion the method of FIG. 7A thatillustrates an exemplary method for determining audio-based input, inaccordance with aspects hereof;

FIG. 8A depicts an exemplary method for identification of controldialogues in an exemplary touch-based user interface, in accordance withaspects hereof;

FIG. 8B depicts exemplary keyword cue overlays associated withtouch-based control dialogues in an exemplary touch-based userinterface, in accordance with aspects hereof;

FIG. 9 depicts an exemplary head-mounted computing device with anexemplary reference frame, in accordance with aspects hereof; and

FIG. 10 depicts an exemplary computing device, in accordance withaspects hereof.

DETAILED DESCRIPTION

The subject matter of the present disclosure is described withspecificity herein to meet statutory requirements. However, thedescription itself is not intended to limit the scope of this patent.Rather, the inventors have contemplated that the claimed subject mattermight also be embodied in other ways, to include different steps orcombinations of steps similar to the ones described in this document, inconjunction with other present or future technologies. Moreover,although the terms “step” and/or “block” may be used herein to connotedifferent elements of methods employed, the terms should not beinterpreted as implying any particular order among or between varioussteps herein disclosed unless and except when the order of individualsteps is explicitly described. Each method described herein may comprisea computing process that may be performed using any combination ofhardware, firmware, and/or software. For instance, various functions maybe carried out by a processor executing instructions stored in memory.The methods may also be embodied as computer-usable instructions storedon computer storage media. The methods may be provided by a standaloneapplication, a service or hosted service (standalone or in combinationwith another hosted service), or a plug-in to another product, to name afew.

At a high level, aspects herein relate to mechanisms that enablehands-free interaction with touch-based operating systems. As can beappreciated, touch-based operating systems (such as Android, iOS, andthe like) often rely on input received via a touchscreen of a mobiledevice running the touch-based operating system. However, interactionwith a touchscreen may not be possible or desirable, depending on theabilities of the user and the situation in which the mobile device isused. For example, when a user is using their hands to perform anothertask, it is often inconvenient and time-consuming to discontinue thetask and interact with the touch-based operating system. Accordingly,aspects of this relate to devices, methods, and systems that facilitatehands-free interaction with touch-based operating systems.

One aspect herein relates to a head-mounted computing device (such as aheadset) that implements a method for hands-free interaction with atouch-based operating system. In a non-limiting example, the headset mayinclude a display (such as a heads up display, an ocular display, andthe like), sensors (such as cameras, microphones, accelerometers,gyroscopes, magnetometers, among others), one or more processors, and amemory. The headset may be communicatively coupled with a mobile devicerunning the touch-based operating system. The headset may also beconfigured to display an instance of a user interface of the touch-basedoperating system, for example, on the ocular display of the headset.Further, the headset may provide the hands-free interaction mode thatfacilitates interaction with the user interface of the touch-basedoperating system using hands-free inputs received via the sensors. Forexample, one exemplary aspect uses movements detected by the headset todetermine instructions or commands for navigating for executingoperations of the touch-based operating system.

Another exemplary aspect uses voice commands detected by the headset todetermine instructions or commands for executing operations of thetouch-based operating system. Accordingly the headset may also beconfigured to monitor the included sensors (such as microphones, amongothers), analyze the input received by the sensors, determineinstructions or commands of the touch-based operating system associatedwith the input, and execute the instructions or commands for navigatingwithin the user interface of the touch-based operating system. Further,the headset may be configured to analyze the user interface of thetouch-based operating system and the code associated with thetouch-based operating system in real time using headset components orsoftware modules to facilitate the hands-free interaction mode.

Another exemplary aspect uses both voice commands and movements detectedby the headset to determine instruction or commands for navigating theuser interface of the touch-based operating system and executingoperations of the touch-based operating system. Further, the headset mayinclude or be in communication with customized databases that comprisecontext specific data (such as user specific settings, hands-freeinterface specific settings, keyword cue libraries, touch-basedinterface specific settings, location specific settings, and the like)to enhance the usability of the hands-free interaction mode. The headsetmay include a wireless communication system (such as Bluetooth, NFC,RFID, WIFI, and the like) to enhance the usability of the hands-freeinteraction mode. By way of example, the wireless communication systemmay enhance the usability of the hands-free interaction mode byproviding location information to the headset which may correlate tocontext specific data stored in the customized databases. The headsetmay be communicatively coupled with a mobile device equipped with awireless communication system to enhance the usability of the hands-freeinteraction mode. Additionally, the headset may be configured to utilizenetwork-based customized databases that comprise the context specificdata.

Turning now to FIG. 1, a block diagram is provided showing an exampleoperating environment 100 in which some embodiments of the presentdisclosure may be employed. It should be understood that this and otherarrangements described herein are set forth only as examples. Otherarrangements and elements (e.g., machines, interfaces, functions,orders, and groupings of functions, etc.) can be used in addition to orinstead of those shown, and some elements may be omitted altogether forthe sake of clarity. Further, many of the elements described herein arefunctional entities that may be implemented as discrete or distributedcomponents or in conjunction with other components, and in any suitablecombination and location. Various functions described herein as beingperformed by one or more entities may be carried out by hardware,firmware, and/or software. For instance, some functions may be carriedout by a processor executing instructions stored in memory.

Among other components not shown, example operating environment 100includes a number of user devices, such as user devices 102 a-102 n; anumber of data sources, such as data sources 104 a and 104 b through 104n; server 106; sensors 103 a-103 n, and network 110. It should beunderstood that environment 100 shown in FIG. 1 is an example of onesuitable operating environment. Each of the components shown in FIG. 1may be implemented via any type of computing device, such as computingdevice 1000, described in connection to FIG. 10, for example. Thesecomponents may communicate with each other via network 110, which mayinclude, without limitation, one or more local area networks (LANs)and/or wide area networks (WANs). In exemplary implementations, network110 comprises the Internet and/or a cellular network, amongst any of avariety of possible public and/or private networks.

It should be understood that any number of user devices, servers, anddata sources may be employed within operating environment 100 within thescope of the present disclosure. Each may comprise a single device ormultiple devices cooperating in a distributed environment. For instance,server 106 maybe provided via multiple devices arranged in a distributedenvironment that collectively provide the functionality describedherein. Additionally, other components not shown may also be includedwithin the distributed environment.

User devices 102 a-102 n may comprise any type of computing devicecapable of use by a user. For example, in one embodiment, user devices102 a-102 n may be the type of computing device described in relation toFIG. 10 herein. By way of example and not limitation, a user device maybe embodied as a personal computer (PC), a laptop computer, a mobile ormobile device, a smartphone, a tablet computer, a smart watch, awearable computer, a personal digital assistant (PDA), an MP3 player,global positioning system (GPS) or device, video player, handheldcommunications device, gaming device or system, entertainment system,vehicle computer system, embedded system controller, a camera, remotecontrol, a bar code scanner, a computerized measuring device, appliance,consumer electronic device, a workstation, a head-mounted computingdevice, or any combination of these delineated devices, or any othersuitable device.

User devices 102 a-102 n can be client devices on the client-side ofoperating environment 100, while server 106 can be on the server-side ofoperating environment 100. Server 106 can comprise server-side softwaredesigned to work in conjunction with client-side software on userdevices 102 a-102 n so as to implement any combination of the featuresand functionalities discussed in the present disclosure. This divisionof operating environment 100 is provided to illustrate one example of asuitable environment, and there is no requirement for eachimplementation that any combination of server 106 and user devices 102a-102 n remain as separate entities.

Data sources 104 a and 104 b through 104 n may comprise data sourcesand/or data systems, which are configured to make data available to anyof the various constituents of operating environment 100, or hands-freeinteraction system 200 described in connection to FIG. 2. For instance,in one embodiment, one or more data sources 104 a through 104 n provide(or make available for accessing) storage 270 of FIG. 2. Data sources104 a and 104 b through 104 n may be discrete from user devices 102a-102 n and server 106 or may be incorporated and/or integratedtherewith. In one embodiment, one or more of data sources 104 a though104 n comprises one or more sensors, which may be integrated into orassociated with one or more of the user devices 102 a-102 n or server106. Operating environment 100 can be utilized to implement one or moreof the components of hands-free interaction system 200, described inFIGS. 2 and 3, including components for motion processing, soundprocessing, and data storage such as keyword custom libraries, userdata, and context specific data.

Turning now to FIG. 2, a block diagram is provided illustrating anexemplary embodiment of hands-free interaction system 200 in which someembodiments of the present disclosure may be employed. Hands-freeinteraction system 200 generally operates to facilitate hands-freeinteraction with applications and features of a touch-based operatingsystem 202. It should be understood that the hands-free interactionsystem 200 shown in FIG. 2 is an example of one system in whichembodiments of the present disclosure may be employed. Each componentshown may include one or more computing devices similar to the operatingenvironment 100 described with reference to FIG. 1. The hands-freeinteraction system 200 should not be interpreted as having anydependency or requirement related to any single module/component orcombination of modules/components illustrated therein. For instance,hands-free interaction system 200 may comprise multiple devices arrangedin a distributed environment that collectively provide the functionalitydescribed herein. It should be understood that the hands-freeinteraction system 200 and/or its various components may be locatedanywhere in accordance with various embodiments of the presentdisclosure.

Head-mounted computing device 220 (described in more detail withreference to FIG. 9) generally facilitates hands-free interaction with atouch-based user interface 206 of a touch-based operating system 202.The head-mounted computing device 220 may comprise a variety of headsetdevice input and output components, such as motion and audio sensors,displays, and input controls, among others. Additionally, thehead-mounted computing device 220 may include computer-usableinstructions stored on computer storage media, such as storage 270.Accordingly, the head-mounted computing device 220 may be configured toexecute computing processes that may be performed using any combinationof hardware, firmware, and/or software. For instance, various functionsmay be carried out by a processor (e.g., headset processor 280)executing instructions stored in memory. The methods may be provided bya standalone application, a service or hosted service (standalone or incombination with another hosted service), or a plug-in to anotherproduct, to name a few.

The functions and processes performed by the hands-free interactionsystem 200 may be associated with applications, services, or routines(such as headset applications 276). In particular, such applications,services, or routines may operate on the head-mounted computing device220, or may be distributed across multiple devices. For example, thefunctions and processes described herein may execute on a touch-baseduser device (such as user device 102 a), servers (such as server 106),or be implemented in the cloud. Moreover, in some embodiments thecomponents of hands-free interaction system 200 may be distributedacross the network 110. Additionally, these components, functionsperformed by these components, or services carried out by thesecomponents, may be implemented at appropriate abstraction layer(s), suchas the operating system layer, application layer, hardware layer, etc.,of the computing system(s). Alternatively, or in addition, thefunctionality of these components and/or the embodiments of theinvention described herein can be performed, at least in part, by one ormore hardware logic components. For example, and without limitation,illustrative types of hardware logic components that can be used includeField-programmable Gate Arrays (FPGAs), Application-specific IntegratedCircuits (ASICs), Application-specific Standard Products (ASSPs),System-on-a-chip systems (SOCs), Complex Programmable Logic Devices(CPLDs), etc. Additionally, although functionality is described hereinwith regard to specific components shown in example hands-freeinteraction system 200, it is contemplated that in some embodimentsfunctionality of these components can be shared or distributed acrossother components.

Accordingly, head-mounted computing device 220, may include one or moreheadset processors 280 that execute instructions (which may be stored byheadset applications 276) for providing a hand-free interaction mode.The hands-free interaction mode may facilitate interaction withprograms, applications, and features of the touch-based operating system202 via the head-mounted computing device 220. In one aspect, theheadset applications 276 include instructions for facilitatinghands-free interaction with existing binary applications (such asapplications 208), that operate in touch-based operating system 202. Forexample, the hands-free interaction system 200 may be configured for usewith any number of applications, via native or existing binaries, suchas applications available from the Playstore, Appstore, and any othersource of touch-based applications. Further, a headset engine 210 mayinterrogate applications 208 running on the touch-based operating system202 to determine screen components/features, such as such inputcontrols, form elements, and navigation commands, among others, includedin a touch-based user interface 206. For instance, the headset engine210 may analyze the user interface layer of the touch-based operatingsystem 202 to determine when various screen components/features arebeing provided for display. In this way, as a touch-based application isbeing executed, various displayed UI components of the application canbe determined. The screen components/features may then be extracted oridentified, and provided to the other components of hands-freeinteraction system 200 for processing, as will be described. As aresult, virtually any application that is operable with touch-basedoperating system 202 may be enabled for hands-free interaction, atruntime. Additionally, the hands-free interaction system 200 may includeXML files for applications that are not compatible with standardhands-free interaction mode instructions. The XML files may override thestandard hands-free interaction mode instructions, and providecustomized instructions. Additionally, the XML files may be merged withexisting binaries of the applications 208 at runtime so that theexisting binaries do not need to be modified.

Further, the head-mounted computing device 220 may include variousheadset device I/O 222, components, which may, for example, sense ordetect hands-free inputs received via head-mounted computing device 220.The received inputs may be processed, for example, by hands-free inputdeterminer 240, to generate one or more hands-free commands. Further,the hands-free interaction system 200 may be configured to determineand/or generate commands associated with received hands-free inputs. Thegenerated hands-free commands may be communicated (for example, by acommunication component 232) to the touch-based operating system 202 forexecution. The determined commands may programmatically instruct thetouch-based operating system 202 to execute the commands, as if it wereexecuting corresponding touch-based inputs.

Headset engine 210 is generally responsible for facilitatingcommunication between touch-based operating system 202, touch-based userinterface 206, motion processing system 242, sound processing system250, interface analyzer 212, storage 270, headset device input/output(I/O) 222, and their respective subcomponents. In some aspects, headsetengine 210 initializes the hands-free interaction mode in response toreceiving a signal from headset device I/O 222. For example, physicalinput control(s) 238 (such as a button, switch, or the like) may receiveinput that initializes the hands-free interaction mode. In some aspects,headset engine 210 also initializes the analysis of the touch-based userinterface 206 and/or touch-based operating system 202, such thattouch-based scrolling features and touch-based control dialoguesdetermined. In some aspects, headset engine 210 receives motion data(e.g., from sensors 226 a-226 n) and transmits the informationhands-free input determiner 240. In some aspects, headset engine 210receives audio input 224 from headset device I/O 222 and transmits theinformation to hands-free input determiner 240.

Touch-based user interface 206 generally facilitates user interactionwith the touch-based operating system 202 in the hands-free interactionsystem 200. In some aspects, the touch-based user interface 206 maycomprise touch-based scrolling features (such as “swipe” features,horizontal scroll bars, vertical scroll bars, and the like). In someaspects, the touch-based user interface 206 comprise touch-based controldialogues (such as text boxes or fields, check boxes, application icons,document tools, radio buttons, and the like, for example).

In aspects, storage 270 may include a keyword custom library 272. Thekeyword custom library 272 may comprise a database containing keywordcue to touch-based control dialogue associations. In aspects, storage270 may also comprise user specific settings, preferences, thresholds,permissions, or any data associated with an individual or group ofindividuals. In aspects, storage 270 may headset applications 276.Storage 270 may be communicatively coupled with the any of thecomponents and subcomponents of hands-free interaction system 200.

Audio input 224 generally refers to components for capturing audio, suchas microphones and the like (e.g. directional and omnidirectionalmicrophones). In embodiments, audio input 224 may comprise multiplemicrophones located at various points of head-mounted computing device220 configured such that ambient noise may be captured and ultimatelyused to aid in processing and analysis of user audio inputs. It will beunderstood that audio input 224 may be any sensor or system of sensorscapable of perceiving audio input and converting audio input into anaudio feed without departing from the scope of this disclosure. Audiooutput 230 generally facilitates sound output to the user. It will beunderstood that any audio output component or components capable ofproducing sound in response to electrical input (such as a speaker) maybe used in embodiments without departing from the scope of thisdisclosure. In embodiments, audio output 230 may be configured tocommunicate with at least headset device I/O 222. Communicationcomponent 232 generally facilitates communication between thehead-mounted computing device 220 and other devices through any suitablecommunication protocol. In embodiments, communication component maycomprise a wireless communication system discussed above or below withreference to FIG. 10.

Display 234 generally facilitates a visual presentation of data to theuser. It will be understood that any display may be used in variousembodiments without departing from the scope of this disclosure. Sensors226 a-226 n may include cameras, microphones, GPS, RFID sensors,infrared sensors, light sensors, magnetometers, gyroscopes, capacitivetransducers, potentiometers, resistive transducers, synchros,accelerometers, and micro-gyroscopes, among others.

Turning now to FIG. 3, a block diagram is provided illustratingadditional aspects of the hands-free interaction system 200 in which anexemplary head-mounted computing device 220 may employ some embodimentsof the present disclosure. The head-mounted computing device 220 maycomprise systems for motion capturing, motion analysis, audio input,audio analysis, audio output, image capture, location detection,orientation determination, contextual determination, interface display,location detection, and network connectivity in which some embodimentsof the present disclosure may be employed; a user devices 102 a-102 n,which may communicatively couple with the head-mounted computing device220 and which may communicatively couple with the network 110; thenetwork 110, which is described in connection to FIG. 1; a server, 106;and, a data source, 104 a. The components of the hands-free interactionsystem 200 may be embodied as a set of compiled computer instructions orfunctions, program modules, computer software services, or anarrangement of processes carried out on one or more computer systems, ascomputing device 1000 described in connection to FIG. 10, for example.

In one embodiment, the functions performed by the components of thehands-free interaction system 200 are associated with convertingdisplacement into touch-based instructions, commands, or input within atouch-based operating system. In embodiments, the hands-free interactionsystem 200 includes a head-mounted computing device headset input/output(I/O) 222, a headset engine 210, and hands-free input determiner 240which may be responsible for detecting, processing, distributing,monitoring, and/or activating other systems or subsystems within thehands-free interaction system 200. For example, in response to receivingan activation command the headset engine 210 may initialize a hands-freeinteraction mode on the head-mounted computing device, wherein thehands-free interaction mode enables interaction with the user interfaceof a touch-based operating system (OS). As part of the initialization ofthe hands-free interaction mode the headset engine 210 may activateinterface analyzer 212, motion processing system 242, sound processingsystem 250, and context analyzer 214.

Motion processing system 242 generally facilitates the processing ofmotion based input data detected by the headset device I/O 222. Themotion processing system 242 may reside in the head-mounted computingdevice 220, user devices 102 a-102 n, server 106, or any locationcapable of being communicatively connected with hands-free interactionsystem 200, for example via network 110. In embodiments, the motionprocessing system 242 may be a subsystem of the headset engine. Inembodiments, the motion processing system 242 may be a subsystem of oneor more user devices 102 a-102 n communicatively coupled with thehead-mounted computing device 220 through communication component 232.In other embodiments, the motion processing system 242 may be asubsystem of one or more networked devices communicatively coupled withthe head-mounted computing device 220 through communication component232.

As such, data from sensors 226 a-226 n may be transmitted to the motionprocessing system 242 for analysis. In some embodiments the motionprocessing system 242 may contain sub-components, including motiondetection component 244, calibration control component 246, and motionconversion component 248 (described in more detail below). In aspects,motion processing system 242 may be communicatively connected withhands-free interaction system 200 through communication component 232.Lateral, translational, and rotational movements of the headset may bedetected by the sensors 226 a-226 n and processed by the motionprocessing system 242 to determine a neutral position and orientation.For example, the sensor data may be processed by the motion processingsystem 242 to detect position and orientation of the headset relative tothree axes and in nine degrees of freedom. In embodiments, motionprocessing system 242 may calibrate the neutral position duringinitiation of the hands-free interaction mode by detecting theorientation of the headset at initiation of the hands-free interactionmode.

In aspects, a threshold displacement may be a predetermined displacementvalue from the neutral position, such as a rotation of the headset by+/−10 degrees from neutral, in any axis. Additionally, the thresholddisplacement may be an angular displacement, a translational movement, arotation, or any other movement of the head-mounted computing device220. As can be appreciated, although generally referred to as singularin this description, any number of threshold displacements may bedetermined. The threshold displacements may correspond to any number oftouch-based inputs for interacting with the touch-based operating system202. For example, a scroll-up touch-based input may have a correspondinghands-free input of rotation of the head-mounted computing device 220upward. Accordingly, the hands-free rotational input may have acorresponding threshold of a predetermined number of degrees upward fromthe neutral position. As a result, inadvertent hands-free inputs may bereduced or eliminated.

In other aspects, the threshold displacement may be automatically anditeratively adjusted, for example, by the motion processing system 242and/or headset engine 210. By way of example and not limitation, thehands-free interaction system 200 may include computer learning ormachine learning instructions that monitor hands-free input (which maybe stored in user data 274) to adjust threshold displacement is based onprior headset motion data. In other aspects, the threshold displacementsmay be automatically adjusted based on usage data for the associatedwith any number of locations (which may be determine, e.g., by locationdeterminer 216) associated with the head-mounted computing device 220.In other aspects, the displacement threshold may be a customized value,which may be determined by a user. For example, a user may adjustthreshold displacement settings via a user interface of a hands-freeinteraction application, which may be stored within the hands-freeinteraction system 200 and executed by any of the devices describedherein. Accordingly, the motion processing system 242 may comparedetected displacement, or translation of the headset with the thresholddisplacement, as will be described in more detail hereinafter.

The motion detection component 244 may monitor the motion processingsystem 242 to detect displacement of the head-mounted computing device220. For example, the motion detection component 244 may compare theinitial reference image stored by the calibration control component 246with subsequent images captured by the motion processing system 242 todetect displacement of the head-mounted computing device 220 relative tothe initial position of the head-mounted computing device 220. It willbe understood that any number of image analysis algorithms may be usedto detect displacement of the head-mounted computing device 220 relativeto the initial position of the head-mounted computing device 220 bycomparing an initial reference image with a subsequent image. Further,threshold and/or detected displacements may include determining aduration of a displacement. For example, a threshold displacement mayrequire that the displacement be maintained for a duration of fiveseconds in order to be recognized as a hands-free input. Additionally,it should be appreciated that any type of data from motion-detectingsensors (such as sensor 226 a-226 n, which may include accelerometers,gyroscopes, and the like, as discussed herein) may be used to determineor detect displacement.

When the motion detection component 244 detects a displacement of thehead-mounted computing device 220 above a threshold displacement, themotion conversion component 248 may convert the angular displacement toan instruction corresponding to one or more touch-based inputs. Themotion conversion component 248 may determine an appropriate instructionbased on the type of displacement. In embodiments, the motion conversioncomponent 248 may augment the instruction with a modifier. For example,a page scrolling instruction may be augmented with a modifier of anumber of pages, such as scroll 10 pages. The modifier may be based onfeatures associated with the detected hands-free input, such as aduration of a detected displacement.

Sound processing system 250 generally facilitates the processing ofaudio-based input data detected by the headset device I/O 222. As such,data from sensors 226 a-226 n may be transmitted to the sound processingsystem 250 for analysis. In some aspects, data from audio input 224 maybe transmitted to the sound processing system 250 for analysis. In someembodiments, sound processing system 215 250 may contain sub-components,including audio detection component including interface analyzer 212252, audio processing component 254, and audio conversion component 256.In some aspects, sound processing system 250 may compare detected audioinput with keyword cues associated with touch-based control dialogues.In aspects, sound processing system 250 may be communicatively connectedwith hands-free interaction system 200 through communication component232. As such, sound processing system 250 may be located in a userdevice, a network, a server, or any location capable of beingcommunicatively connected with hands-free interaction system 200.

In embodiments, because touch-based operating systems are configured toallow audio input to only one application the sound processing system,may further comprise an audio share component (not depicted). The audioshare component may allow multiple processes, applications, componentsor the like to receive audio input simultaneously. In other words, theaudio share component may allow an audio feed to continue to thetouch-based operating system without further processing or analysis andcontinue to the audio detection component 252. Said another way, theaudio share component facilitates providing an audio feed to atouch-based application without compromising the functionality of thesound processing system.

For instance, a user could run a teleconference application within thetouch-based operating system and the hands-free navigation systemsimultaneously and the audio share component may allow the audio feed tocontinue to the teleconference application. Additionally, the audioshare component may provide the audio detection component 252 with theaudio feed. As such, in embodiments, the audio share component mayduplicate the audio feed.

The audio detection component 252 generally facilitates monitoring audioinput 224 and/or sensor 226 a-226 n to detect an audio feed. Forexample, the audio detection component 252 may listen to a microphone ofthe head-mounted computing device 220 in order to detect that signalsare being received by the microphone. Continuing with this example, theaudio detection component 252 may be responsible for determining thatthe signals received by the microphone are above a predetermined volume,which may indicate that the signals should be further processed todetermine hands-free audible inputs. In embodiments, the audio detectioncomponent 252 provides detected audio feeds to the audio processingcomponent 254.

The audio processing component 254 generally facilitates the processingof the audio feed to identify, isolate, and analyze the user's speech.In embodiments, the audio processing component 254 may use voicerecognition algorithms, noise reduction algorithms, speech-to-textalgorithms, machine-learning algorithms, or the like to process theaudio feed. In some aspects, the audio processing component 254 mayreceive multiple audio feeds from the audio detection component 252. Inthese embodiments, the audio processing component 254 may process themultiple audio feeds to, at least partially, isolate the user's speechfrom background noise. It will be understood that any noise reductionalgorithms, voice isolation algorithms, or any suitable algorithm ortechnique may be used to, at least partially, isolate the user's speechfrom the background. In embodiments, the audio processing component 254may receive the audio feed, from the audio detection component 252, andidentify a first audible input associated with the touch-based controldialogue by the interface analyzer 212. In embodiments, the audioprocessing component 254 may analyze the audio feed and compare theaudio feed to the keyword cue to determine if the processed audio feedmatches a keyword cue.

The audio conversion component 256 generally facilitates the conversionof an audio feed-keyword cue match to the associated control dialogue.As such, the audio conversion component 256 may receive the matchingkeyword cue from the audio processing component 254 and determine thecontrol dialogue that is associated with the keyword cue.

Interface analyzer 212 generally facilitates the detection oftouch-based user interaction features within the touch-based userinterface 206, touch-based operating system 202, applications 208 withinthe touch-based user interface 206, and documents 204 within thetouch-based user interface 206. As used herein, touch-based userinteraction features include touch-based scrolling features (such as“swipe” features, horizontal scroll bars, vertical scroll bars, and thelike), touch-based control dialogues (such as text boxes or fields,check boxes, application icons, document tools, radial buttons, and thelike, for example), and more generally any element, feature, icon,command, code, extension, macro, etc. that facilitate user interactionwithin a touch-based user interface, operating system, application,and/or document. In aspects, the interface analyzer 212 may detectand/or identify touch-based user interaction features by scanning thesource code of touch-based user interface 206, touch-based operatingsystem 202, and/or applications 208 within the touch-based userinterface 206. In aspects, interface analyzer 212 may reference keywordcustom library 272 and/or user data 274 to facilitate context specificfeatures.

In some embodiments, context analyzer 214 generally facilitatesanalyzing contextual data and context specific features of thehands-free interaction system 200. Contextual data may be any datarelevant to the operation of the headset engine 210 or itssubcomponents. By way of non-limiting example, contextual data may beuser data (such as user data 274), application data (such as associatedwith application 208), or data received from the communication component232, or location determiner 216. In embodiments, context analyzer 214additionally monitors interface analyzer 212 and determines if anycustomized data is relevant to the current instance of the touch-baseduser interface. In embodiments, the context analyzer may alter thefunction of hands-free input determiner 240, headset engine 210 or theirrespective subcomponents in response to analysis. For example, inresponse to the interface analyzer 212 analyzing a specific instance ofthe touch-based user interface, context analyzer 214 may locate a customkeyword cue library (such as custom keyword library 272) associated withthe specific instance of the touch-based user interface. Contextanalyzer 214 may then communicate the custom keyword cue library tosound processing system 250.

In embodiments, context analyzer 214 may use location information toalter the function of hands-free input determiner 240. For example,context analyzer 214 may analyze location data (such as Bluetooth beaconinformation detected by location determiner 216) associated withspecific custom keyword libraries. In embodiments, context analyzer 214may determine that specific motion-based thresholds are indicated as aresult of contextual data.

In embodiments, the interface analyzer 212 may detect a compatibletouch-based user interface, for example Google Android or Apple iOS, andanalyze the touch-based OS to detect a touch-based command associatedwith the first instance of the user interface. The interface analyzermay detect, for example, that the first instance of the user interfacecomprises a touch-based scrolling feature. For example, the touch-basedscrolling feature may comprise a touch-based scrolling featureassociated with the touch-based operating system, for navigating to adifferent menu screen of the touch-based operating system; a touch-basedscrolling feature associated with an application, for navigating to adifferent menu screen of the application; and/or, a touch-basedscrolling feature associated with the document, for navigating to adifferent portion of the document.

In embodiments, when interface analyzer 212 detects a touch-basedscrolling feature the headset engine 210 may activate the motionprocessing system 242 which calibrates the motion capture system,monitors displacement, and converts displacement to an associatedtouch-based scrolling feature. Once activated, the motion processingsystem 242 may activate the calibration control component 246. Thecalibration control component 246 detects an initial position of thehead-mounted computing device, the initial position including anorientation of the head-mounted computing device 220 relative to one ormore axes. In embodiments, the calibration control component 246 maydetermine the initial position of the head-mounted computing device byactivating the motion detection component 244, which may employ a camera(e.g., one of sensors 226 a-226 n) to capture an image. The calibrationcontrol component 246 may store the image, at least temporarily, as aninitial reference image for comparison against subsequent images todetermine the relative movement of the head-mounted computing device220.

Further, in embodiments, interface analyzer 212 associates the detectedtouch-based scrolling feature with a displacement of the head-mountedcomputing device 220 in a corresponding direction. For example, ifinterface analyzer 212 detects a touch-base scrolling feature which isassociated with the touch-based OS corresponding to “swiping” from leftto right within the first instance of the user interface; the interfaceanalyzer 212 may associate a displacement to the right relative to theinitial position of the head-mounted computing device 220 with thetouch-based swipe from left to right. For another example, if theinterface analyzer 212 detects a vertical scrollbar within the firstinstance of the user interface; the interface analyzer 212 may associatean angular displacement “up” relative to the initial position of thehead-mounted computing device 220 with moving the vertical scrollbar upa predetermined number of scroll units. If the interface analyzer 212detects a horizontal scrollbar within the first instance of the userinterface; the interface analyzer 212 may associated angulardisplacement to the right relative to the initial position of thehead-mounted computing device 220 with moving the horizontal scrollbarright a predetermined number of scroll units.

Further, the headset engine 210 may activate the display component 234to display the first instance of the user interface of the touch baseoperating system on the display (described in more detail with referenceto FIG. 2, and indicated by reference numeral 234) of the head-mountedcomputing device 220. In embodiments, the headset engine 210 may thenactivate motion detection component 244 that detects the first angulardisplacement of the head-mounted computing device, the first angulardisplacement being above a first threshold angular displacement, whereinthe first threshold angular displacement is an angular displacementrelative to the initial position.

Additionally, if the interface analyzer 212 detects a touch-basedscrolling feature corresponding to a swipe from left to right andassociated an angular displacement to the right relative to the initialposition of the head-mounted computing device with the touch-based swipefrom left to right, and the motion detection component 244 detects anangular displacement of the head-mounted computing device from theinitial position to the right that is above the threshold; the motionconversion component 248 may determine that an instruction swiping fromleft to right is required. The motion conversion component 248 may thenconvert the angular displacement to an instruction corresponding toswipe from left to right and pass the instruction to the commandgenerator 213. The command generator 213 generates a touch-based inputcorresponding to the instruction indicated by the motion conversioncomponent 248 and executes the instruction within the touch-based userinterface. It will be understood that any displacement may be detected,analyzed, and converted by the system and the preceding example isintended as an example, and not intended as a limitation.

In embodiments, the interface analyzer 212 may detect a compatibletouch-based operating system and analyze the touch-based user interfaceto detect at least one touch-based control dialogue associated with thefirst instance of the user interface. For example, the touch-basedcontrol dialogue may comprise a touch-based command associated with thetouch-based operating system, for enabling audio outputs or changing theaudio output volume; and/or, a touch-based control dialogue associatedwith an application, for starting the application or selecting anapplication element, a text field or a “send” element, for instance. Itwill be understood that the preceding examples are only a small subsetof potential touch-based control dialogues and not intended as alimitation.

In embodiments, when interface analyzer 212 detects a touch-basedcontrol dialogue the headset engine 210 may activate the soundprocessing system 250 which monitors and processes the audio input,analyzes the audio input, and converts the audio input to an associatedtouch-based control dialogue. Once activated, the sound processingsystem 250 may activate interface analyzer 212, which detects,identifies, and associates control dialogue options with keyword cues.In embodiments, interface analyzer 212 detects the touch-based controldialogues by scanning the source code associated with the first instanceof the user interface at runtime and extracting features. For example,if the interface analyzer 212 detects a “button” embedded into the firstinstance of the user interface, the interface analyzer 212 willassociate the button text with a keyword cue. In embodiments, theinterface analyzer 212 may detect a customized keyword cue libraryassociated with the first instance of the user interface stored in thememory of the hands-free computing device (such as storage 270). Inembodiments, the interface analyzer 212 may detect a customized keywordcue library stored in a communicatively coupled user device (such asuser device 102 a). In embodiments, the interface analyzer 212 maydetect a customized keyword cue library stored in a communicativelycoupled data source (such as data source 104 a).

The headset engine 210 activates the display component 234 to displaythe first instance of the user interface of the touch base operatingsystem on the display of the head-mounted computer device. Inembodiments, the headset engine 210 then activates the audio detectioncomponent 252 to detect audio received, e.g., via sensors 226 a-226 n oraudio input 224, which passes audio input to the audio processingcomponent 254. As used herein, reference to an audio feed can refer toeither the acoustic signals captured by an audio input device or theelectrical signals that are produced by the audio input element.

In response to the command generator 213 executing the instructionwithin the touch-based user interface, the headset engine 210 theninstructs the display component 234 to display a second instance of theuser interface of the touch-based operating system on the display of thehead-mounted computing device.

Turning now to FIG. 4a , a block diagram is provided illustrating anexemplary motion-based hands-free interaction mode 400 that may beimplemented, at least in part, by the headset described in reference toFIG. 3. In embodiments, the headset engine initializes a hands-freeinteraction mode 402 associated with the motion processing system 242.The hands-free interaction mode 402 may include activating the interfaceanalyzer to detect a touch-based scrolling feature within the firstinstance of the user interface and associate the touch-based scrollingfeature with a first angular displacement. At block 404, the initialposition of the hands-free computing device is detected and an initialreference orientation is determined. In embodiments, this may be done bythe calibration control component 246, as discussed with reference toFIG. 3. In embodiments, the calibration control component 246 may bereactivated by the user at any point to reset the reference orientation.For example, the user may have their head at an odd or uncomfortableposition at the time the initial reference orientation is determined,such that it would be undesirable to maintain the position duringhands-free navigation; the user may re-activate the calibration controlcomponent 246 so that the reference orientation may be re-determined. Inembodiments, the head-mounted computing device 220 may have a button(such as physical input elements 238) that is associated withre-activating the calibration control component 246. Additionally,and/or alternatively, in embodiments, a pre-determined audio command isassociated with re-activating the calibration control component.

At block 406, the display presents the first instance of the userinterface. In embodiments, this is done by headset engine 210 asdiscussed with reference to FIG. 3. At block 408, movement of thehead-mounted computer device is detected by the motion detectioncomponent 244, as described in reference to FIG. 3. At block 410, thedetected movement is determined to have exceeded the angular thresholdassociated with the touch-based scrolling feature by the motiondetection component 244, as described in reference to FIG. 3. At block412, the detected displacement is converted into the touch-basedscrolling instruction associated with the touch-based scrolling featureby the motion conversion component 248. Further, a command is generatedand executed within the first instance of the touch-based interface. Atblock 414, in response to executing the touch-based scrolling command, asecond instance of the user interface is displayed. It will beunderstood that method 400 may be executed in a repetitive manner asmany times as desired.

In embodiments, some processes of the motion-based hands-freeinteraction mode may be at least partially completed by a user device(such as user device 102 a) communicatively connected with thehead-mounted computing device 302,220 as described in reference to FIG.3.

Turning now to FIG. 4b , a block diagram is provided illustrating anexemplary audio-based hands-free interaction mode 416 that may beimplemented, at least in part, by the headset illustrated in FIG. 3. Inembodiments, the headset engine initializes a hands-free interactionmode 418 associated with the sound processing system 250. Initializingthe hands-free interaction mode 418 may include activating the interfaceanalyzer to detect at least one touch-based control dialogue within thefirst instance of the user interface. At block 420, the at least onetouch-based control dialogue is identified and associated with a keywordcue. In embodiments, the interface analyzer may analyze the source codeof an application running within the touch-based user interface andidentify a name associated with the touch-based control dialogue in theapplication source code. The interface analyzer may then generate akeyword cue substantially similar to the name from the applicationsource code and associate the generated keyword cue with the touch-basedcontrol dialogue. For example, if the touch-based user interface wasdisplaying a construction blueprint in an application and theapplication has a touch-based control dialogue that opens a zoom featurewithin the application, then the interface analyzer may, in real time:access the application's source code; identify the portion of the codeencoding the zoom feature; detect that the feature is named “zoom;”generate a keyword cue “zoom;” and, associate the generated keyword cue“zoom” with the touch-based control dialogue that opens the zoomfeature. In embodiments, the interface analyzer may reference apredefined or custom keyword cue library when associating touch-basedcontrol dialogues with keyword cues, as discussed in detail in referenceto FIG. 7B.

At block 422, the display presents the first instance of the userinterface. In embodiments, the headset engine 210 orchestrates thepresentation of the user interface as discussed with reference to FIG.3. In embodiments, at block 424, a graphical overlay may besimultaneously displayed over the first user interface comprising atleast one visual indicator of the keyword cue the interface analyzeridentified with the first user interface. In further embodiments, thevisual indicators may be positioned substantially proximate to thelocation of the touch-based control dialogue as illustrated anddiscussed with reference to FIG. 8B.

At block 426, an audible input is detected by the headset. Inembodiments, the audible input may be initially detected by the audioinput 224, for instance the phrase “zoom” spoken by the user. The audioinput 224 may then convert the spoken phrase “zoom” into an audio feedand pass the audio feed to audio detection component 252. The audiodetection component 252 may then activate the audio processing component254.

At block 428, the audio feed is processed and analyzed to determine ifthe audible input matches a keyword cue and thus a touch-based controldialogue. In embodiments, the audio processing component 254 may usevoice recognition algorithms, noise reduction algorithms, speech-to-textalgorithms, machine-learning algorithms, or the like to process theaudio feed. For example, the audio feed may be processed to isolate thephrase “zoom” spoken by the user from any ambient, incidental, orbackground noise. The audio processing component 254 may then analyzethe processed audio feed and compare the processed audio feed to thekeyword cue to determine if the processed audio feed matches a keywordcue.

At block 430, a touch-based command is generated corresponding to thetouch-based control dialogue associated with the detected keyword cue,and the command is executed within the first instance of the touch-baseduser interface. In other words, when the audio processing componentdetermines that the audio feed matches a keyword cue, the audioconversion component converts the matched keyword cue into theassociated control dialogue. The audio conversion component then passesthe control dialogue to the command generator, which generates a commandequivalent to the touch-based control dialogue. The generated command isthen executed by the headset engine within the touch-based userinterface. For example, once the audio processing component matches thephrase “zoom” to the keyword cue “zoom,” the audio conversion componentconverts the keyword cue “zoom” into an instruction equivalent to selectzoom control dialogue. The instruction is then passed to the commandgenerator, which generates a command equivalent to a touch-based userselection of the zoom touch-based control dialogue. The command is thenexecuted by the headset engine within the touch-based user interface,which results in the zoom feature activating. It will be understood thatmethod 416 may be executed in a repetitive manner as many times asdesired.

Turning now to FIG. 4c , a block diagram is provided illustrating anexemplary motion- and audio-based hands-free interaction mode that maybe implemented, at least in part, by the headset illustrated in FIG. 3.The hands-free interaction mode is initiated in block 440. Inembodiments, the interface analyzer, as discussed in reference to FIG.3, analyzes the touch-based OS to detect at least one touch-basedcommand associated with the first instance of the user interface. Forexample, the interface analyzer may detect that the first instance ofthe user interface comprises a touched-based scrolling feature, fornavigating to a different menu screen of the touch-based operatingsystem for instance and the interface analyzer 212 may also detect thatthe first instance of the user interface comprises a touch-based controldialogue, for opening an application installed in the touched-basedoperating system for instance.

The headset engine 210 may then initialize the hands-free movementprotocol 436 and initialize the hands-free audio protocol 438. Inembodiments, the hands-free movement protocol 436 may comprise some,part, or all of the processes of the motion-based hands-free interactionmode 400. For example, the headset engine 210 may activate thecalibration control component 246 to determine an initial position ofthe head-mounted computing device, the initial position including anorientation of the head-mounted computing device relative to one or moreaxes. In embodiments, the hands-free audio protocol 438 may comprisesome, part, all, or alternative processes of the audio-based hands-freeinteraction mode 416. For example, the headset engine may activate thecontrol dialogue detection module to enable audio-based hands-freenavigation. It will be understood that the headset engine may initializethe hands-free movement protocol 436 and the hands-free audio protocol438 in any order or simultaneously.

Once the initial reference orientation of the headset is determined andthe touch-based control dialogue(s) are associated with keyword cues,the first instance of the touch-based user interface is displayed, asshown at block 440. At block 442, the motion detection component and theaudio detection component monitor, detect, and analyze input data fromthe headset I/O system, as described in reference to FIG. 4A and FIG.4B, respectively.

At block 444, when movement is detected, the motion detection componentdetermines if the movement exceeds the relevant threshold, as discussedwith reference to block 410. If the relevant threshold is exceeded, thedisplay is adjusted at block 446, as discussed with reference to blocks412 and 414. If the relevant threshold is not exceeded, the systemreturns to block 442.

At block 448, when audio input is detected, the audio processingcomponent determines if the audio input matches a keyword cue, asdiscussed with reference to block 428. If the audio input matches akeyword cue, the touch-based command equivalent to the associatedcontrol dialogue is executed at block 450, as discussed with referenceto block 430. It will be understood that method 432 may be executed in arepetitive manner as many times as desired.

Turning now to FIG. 5, a block diagram is provided showing an exemplarymulti-axis motion-based method 500 that facilitates hands-freeinteraction with a touch-based operating system. In other words, method500 facilitates simple and complex motion-based hands-free interactionwith a touch-based operating system when utilized with a compatibleheadset. As an illustrative example, a user wearing a compatible headsetinitializes the hands-free navigation interface at block 510. Theinitial reference orientation of the headset is determined, aspreviously discussed, to be equivalent to facing forward in a neutralposition. At block 512, the headset detects movement. For instance, theuser turns their head from neutral to the right and up simultaneously.At block 514, the system determines if the movement is in a first axis.For example, the movement in the first axis may be a rotation about thez-axis, from the initial reference position toward the x-axis (to theright of a user). In other words, the system may detect the user turned(rotated) their head from facing forward to the right. At block 516, thesystem determines if the movement also occurred in a second axis. Forexample, the movement in the second axis may be a rotation about thex-axis, from the initial reference position toward the z-axis (upwardfrom the perspective of a wearer). In other words, the system may detectthe user also (rotated) their head from a position substantiallyparallel to the y-axis toward the z-axis.

At block 518, the system determines if the movement in the first axisexceeded the first axis threshold. The first axis threshold may be, forexample, predetermined to be +/−10 degrees from the initial referenceposition. If the system detects an displacement in the first axis beyond+/−10 degrees, the system determines that the threshold was exceeded. Ifthe system detects a displacement in the first axis below +/−10 degrees,the system determines that the threshold was not exceeded. For example,if the user turned their head to the right by 20 degrees, the systemwould determine that the first axis threshold was exceeded.

At block 520, the system determines if the movement in the second axisexceeded the second axis threshold. The second axis threshold may be,for example, predetermined to be +/−10 degrees from the initialreference position. If the system detects a displacement in the secondaxis beyond +/−10 degrees, the system determines that the threshold wasexceeded. If the system detects displacement in the second axis below+/−10 degrees, the system determines that the threshold was notexceeded. For example, if the user turned their head up by 20 degrees,the system would determine that the second axis threshold was exceeded.

At block 522, the system executes the touch-based scrolling featureassociated with the multi-axis input and displays a second instance ofthe touch-based user interface. In embodiments, the multi-axis input mayrepresent two independent touch-based scrolling features. Continuingwith the previous example, the multi-axis input—right and up—maycorrespond to moving a horizontal scroll bar to the right apredetermined number of scrolling units and moving a vertical scroll barup a predetermined number of scrolling units. In embodiments, themulti-axis input may represent a single touch-based scrolling feature.For example, the multi-axis input—right and up—may correspond to movinga vertical scroll bar a number of scrolling units equivalent to a fullpage of the displayed document.

Returning to block 516, if movement is only detected in the first axisthe system determines if the movement exceeded the first axis threshold,at block 524. If the movement did not exceed the first axis threshold,the system returns to block 512. If the movement did exceed the firstaxis threshold, the system executes the touch-based scrolling featureassociated with the first axis input and displays a second instance ofthe touch-based user interface, at block 526.

Returning to block 518, if the detected movement does not exceed thethreshold of the first axis the system proceeds to block 528. At block528, the system determines if the movement exceeded the threshold of thesecond axis. If the movement did not exceed the second axis threshold,the system returns to block 512. If the movement did exceed the secondaxis threshold, the system executes the touch-based scrolling featureassociated with the second axis input and displays a second instance ofthe touch-based user interface, at block 530.

It will be understood that the examples provided in reference toexemplary method 500 represent only a subset of the possible multi-axisinputs and associated touch-based scrolling commands within the scope ofthe present disclosure; as such the examples are merely illustrative andnot meant to be interpreted as limiting.

Turning now to FIG. 6A, an exemplary figure illustrating a possible usecase is provided consistent with embodiments of the disclosed invention.It will be understood that FIG. 6A includes only a subset of theembodiment's systems and components to ensure clarity of the figure.After initializing the hands-free navigation interface, a user wearing acompatible headset is presented, through a display, with a first portionof the blueprint 602 associated with a building the user isconstructing. After inspecting the areas of the building 600 associatedwith the first portion of the blueprint 602, the user may turn theirhead to the left. At 604, the system detects the movement in the firstaxis, in this case the x-axis, and determines that the movement in thefirst axis exceeded the first axis threshold. The system then convertsthe movement to a command associated with the touch-based scrollingfeature equivalent to scrolling to the left. The system then executesthe command within the touch-based user interface. The system thendisplays the second instance of the touch-based user interface. Here,the command results in scrolling left within the displayed blueprint apredetermined distance and the display shows the second portion of theblueprint 606.

Turning now to FIG. 6B, an exemplary figure illustrating anotherpossible use case is provided consistent with embodiments of thedisclosed invention. It will be understood that FIG. 6B includes only asubset of the embodiment's systems and components to ensure clarity ofthe figure. After initializing the hands-free navigation interface anddetecting a vertical scroll bar at scroll bar location 616 a and ahorizontal scroll bar at scroll bar location 614 a, a user wearing acompatible headset may be presented, through a display, with the firstpage of an expense report 612 associated with a building the user isconstructing. After reviewing the first page of the expense report, 612the user may rotate their head down. At 618, the headset may detect theangular displacement about the x-axis, and determine that the motion inthe first axis exceeds the first axis threshold. The system thenconverts the movement to a command associated with moving the verticalscroll bar from scroll bar location 616 a down a predetermined distanceto scroll bar location 616 b. The system then executes the commandwithin the touch-based user interface. The system then displays thesecond instance of the touch-based user interface. Here, the display nowshows the second page of the expense report 620.

Turning now to FIG. 7A, a flow diagram is provided that illustrates amethod 700 that generally facilitates the accurate conversion of a voiceinput into an executed command within the touch-based user interface ofthe touch-based operating system. Initially, as shown at block 701, themethod includes receiving input data from a headset sensor. Further, atblock 702, the method may include determining whether the received inputdata is an audio feed. For example, audio input associated with at atouch-based control dialogue may be detected. In some aspects, at block704, the method comprises analyzing the audio input. In embodiments, theaudio feed is processed using computer-based speech recognitiontechniques to identify the audio input. At block 706, the method maydetermine whether the analyzed audio input matches a keyword cue. Inembodiments, the analyzed audio input is compared to generated keywordcues that are associated with touch-based control dialogues by a controldialogue detector. It shall be understood that any voice-to-textmatching algorithm or algorithms may be used to determine if the audioinput matches a keyword cue. In embodiments, the touch-based controldialogues may be associated with a mobile application executing in thetouch-based operating system. In embodiments, at block 708, the methodcomprises determining whether the keyword cue that matches the audioinput corresponds to an instruction to suspend the hands-freeinteraction mode. For example, the method may determine if the keywordcue corresponds to an instruction to set the audio input component to apassive mode. In this context, a passive mode refers to (at leasttemporarily) pausing analysis of headset sensors and/or audio inputsystems within the hands-free interaction mode. However, in embodimentsthe headset sensors and/or audio input systems remain active for usewith other processes. In other words, headset sensors and/or audio inputsystems may continue to transmit data to an application running withinthe touch-based operating system. For example, after using thehands-free interaction mode to answer a video chat request from a videochat application, a user may put the hands-free interaction mode inpassive mode by speaking the keyword cue associated with the passivemode, but continue to use the headset microphone and camera within thevideo chat application.

In embodiments of the method, at block 710, in response to determiningthat the keyword cue is associated with the instruction to set the audioinput to passive mode, the audio input is set to a passive mode. In someembodiments, at block 712, a command is received to deactivate thepassive mode and the method returns to block 702. In embodiments, thecommand to deactivate the passive mode may be associated with a physicalinput element (such as a button) located on the headset. Returning toblock 708, in embodiments, when the keyword cue is anything other thanthe passive mode instruction, the touch-based control dialogue commandis generated and executed within the touch-based user interface.

Turning now to FIG. 7B, a portion of the flow diagram depicted in FIG.7A is provided that illustrates an exemplary method 716 for comparingthe audio input to keyword cues. The exemplary method 716 generallyfacilitates comparing the audio input to generated keyword cues, customkeyword cues, and auxiliary keyword cues. As discussed in reference toFIG. 7A, at block 704, the method comprises analyzing the audio input.At block 718, the analyzed audio input may be compared with keyword cuesgenerated by the interface analyzer. As discussed previously, thekeyword cues may be identified and generated by the interface analyzerby analyzing the source code associated with the first instance of theuser interface.

In some embodiments, at block 720, the analyzed audio input may becompared with a custom keyword cue library 722. As such, a user maycreate customized keywords cues and associate the customized keywordcues with touch-based control dialogues. In embodiments, this customkeyword library may supersede, at least partially, the keyword cuesgenerated by the interface analyzer. In embodiments, the keyword cue maybe a customized or predetermined keyword cue-control dialoguecombinations associated with a specific first instance of the userinterface.

In embodiments, at block 724, the analyzed audio input may be comparedwith an auxiliary keyword cue library 728. In embodiments, the auxiliarykeyword cue library may comprise a table comprising a plurality ofkeyword cues associated with a touch-based control dialogue. Forexample, if the interface analyzer identifies a touch-based controldialogue that is unpronounceable, the interface analyzer mayautomatically substitute at least one auxiliary keyword cue from theauxiliary keyword cue library that is associated with theunpronounceable control dialogue. Additionally, and/or alternatively, ifthe first instance of the touch-based user interface contains multipletouch-based control dialogues that result in substantially similargenerated keyword cues, the auxiliary keyword cue library may providealternate keyword cues in the same manner.

Turning now to FIG. 8A, an exemplary touch-based user interface isprovided showing exemplary instances of detected control dialogues. Inother words, 1-28 indicate interface features that may be identified astouch-based control dialogues. In embodiments, interface analyzer 212may detect interface features 1-28 by analyzing the source codeassociated with the user interface. In the depicted example, interfaceanalyzer 212 may analyze the source code associated with the applicationrunning within the touch-based operating system that is currentlypresented by the touch-based user interface. However, interface analyzer212 may also analyze source code associated with the touch-basedoperating system itself or any other code present.

In embodiments, once interface features (such as interface features1-28) are identified as touch-based control dialogues by the interfaceanalyzer 212, the interface analyzer 212 may analyze the controldialogues, generate keyword cues, and associate the keyword cues withthe control dialogues. In embodiments, the interface analyzer 212 mayreanalyze the relevant source code. In embodiments, the interfaceanalyzer 212 may provide at least partial analysis of the relevantsource code to the interface analyzer 212.

Turning now to FIG. 8b , an exemplary touch-based user interface withkeyword cue overlays is depicted. In other words, 30-38 indicate displayoverlays that may be presented to the user to assist in the use ofaudio-based hands-free navigation with embodiments of the presentdisclosure. In embodiments, the overlays may be automatically displayedby the headset engine 210 based on the analysis of the touch-based userinterface by the interface analyzer 212. In embodiments, the overlaysmay be automatically generated by the multiple subcomponents of theheadset engine 210. For example, interface analyzer 212 may detectinterface features (such as interface features 1-28 from FIG. 8A),identify the interface features as control dialogues, and activate audiodetection component 252; audio detection component 252 may analyze thecontrol dialogues, generate keyword cues, and associate the keyword cueswith the control dialogues; headset engine 210 may detect theassociations, generate overlays containing keyword cues, and cause theoverlays to be superimposed over the display of the touch-based userinterface (such as overlays 30-38). It will be understood that thepreceding is merely used as an example method for creating overlaysconsistent with the disclosure, and not meant as a limitation.

However, the automated creation of overlays may result in more controldialogues than are necessary, useful, or desirable being presented inoverlays in a given instance of the touch-based user interface. In otherwords, a purely automatic generation of keyword cue overlays mayinadvertently hinder hands-free navigation of the touch-based userinterface. Thus, in embodiments, the overlays may be automaticallydisplayed by the headset engine 210 based on customized preferences. Insuch an embodiment, the headset engine 210 may identify predeterminedoverlay templates associated with instances of the touch-based userinterface in a custom library.

In embodiments, the function of the control dialogues may be determinedby the headset engine 210, and/or its subcomponents, and overlays may begenerated only for those associated keyword cues that are determined tobe relevant to the user. In embodiments, this determination may be doneby context analyzer 214 based on contextual data. In embodiments, thisdetermination may be done, at least partially, based on user preferences(for example user preferences stored in user data 274).

Turning now to FIG. 9, an exemplary head-mounted computing device 900 isdepicted consistent with some embodiments of the present disclosure.Head-mounted computing device 900 generally facilitates hands-freeinteraction with the touch-based user interface of a touch-basedoperating system. It will be understood that while exemplaryhead-mounted computing device 900 is depicted with various sensors thelocation and number of sensors may vary in embodiments without departingfrom the scope of this disclosure. In embodiments, head-mountedcomputing device 900 may comprise multiple sensors for sensing motionand audio, and components for displaying the touch-based user interfaceto the user. For example, exemplar display 902 generally facilitatesdisplaying the touch-based user interface to the user. In embodiments,display 902 may be configured with head-mounted computing device 900such that display 902 may present for display the touch-based userinterface. In embodiments, display 902 may additionally be configured todisplay keyword cue overlays, as described above. In embodiments,display 902 may be, at least, partially translucent such that a user maylook through display 902 and perceive both the displayed touch-baseduser interface and the environment. In embodiments, display 902 may be amonocular display. In embodiments display 902 may be a binoculardisplay. However, it will be understood that any display may be used inembodiments of the disclosed invention without departing from the scopeof this disclosure. In embodiments, display 902 may be configured tocommunicate with at least headset device I/O 222.

Exemplary sensor 904 generally facilitates the capture of audio input.In embodiments, sensor 904 may be a directional microphone. Inembodiments, sensor 904 may be an omnidirectional microphone. Inembodiments not depicted, sensor 904 may further comprise multiplemicrophones located at various points of head-mounted computing device900 configured such that ambient noise may be captured and ultimatelyused to aid in processing and analysis of user audio inputs. It will beunderstood that sensor 904 may be any sensor or system of sensorscapable of perceiving audio input and converting audio input into anaudio feed without departing from the scope of this disclosure. Inembodiments, exemplary sensor 904 may be configured to communicate withhands-free input determiner 240 and its subsystems.

Exemplary physical input sensor 906 generally provides an inputcomponent that generally facilitates the reactivation of varioushands-free navigation features. In embodiments, physical input sensor906 may be configured to signal hands-free input determiner 240 toreactivate audio-based commands after a passive command has been issued,as discussed in relation to FIG. 7A. In embodiments, physical input 906may be configured to signal hands-free input determiner 240 torecalibrate the reference orientation of the headset as discussed above.In embodiments, physical input sensor 906 may comprise multiple physicalinput sensors such that a first sensor may be configured to signalhands-free input determiner 240 to reactivate audio-based commands and asecond sensor may be configured to signal hands-free input determiner240 to recalibrate the reference orientation. It will be understood thatphysical input sensor 906 may be any sensor capable of detectingphysical interaction without departing from the scope of thisdisclosure.

Exemplary audio output 908 generally provides audio output from thehead-mounted computing device 900 to the user. It will be understoodthat any audio output component or components capable of producing soundin response to electrical input (such as a speaker) may be used inembodiments without departing from the scope of this disclosure. Inembodiments, audio output 902 may be configured to communicate with atleast headset device I/O 222.

Exemplary motion sensor 910 generally facilitates motion detection forthe motion processing systems discussed above. As used herein, a motionsensor may comprise at least one accelerometer, multi-axisaccelerometer, magnetometer, gyroscope, capacitive transducer,potentiometer, resistive transducer, synchro, or any similar sensorcapable of detecting motion in at least one axis. In embodiments, motionsensor 910 may comprise at least one motion sensor. In embodiments,motion sensor 910 may comprise a plurality a motion sensors. Inembodiments, motion sensor 910 may be configured to communicate withhands-free input determiner 240 and its subsystems.

In embodiments, exemplary sensor 912 generally facilities motiondetermination. In embodiments, sensor 912 may be a digital sensor thatis sensitive to light configured to capture images periodically (such asat 60 frames/sec or at any predetermined rate). In embodiments, imagecapture component 912 may be a digital sensor that is sensitive to lightconfigured to capture images continuously. In embodiments, sensor 912may be configured to communicate with hands-free input determiner 240and its subsystems. It will be understood that exemplary sensor 912 mayinclude any sensor capable of capturing digital images (such as acamera, video camera, or the like) may be used in embodiments withoutdeparting from the scope of this disclosure.

As referred to herein, displacement may refer to any change in positionof the headset (such as head-mounted computing device 900) relative tothree axes and in nine degrees of freedom. This may include, but is notlimited to, translation in or rotation about any of three axes. It isnoted that terminology used in relation to displacement inthree-dimensional space varies widely by field (for example aviation,biomechanics, and computer science) and may vary widely in common usage.To that end, every attempt has been made to clarify and simplifyportions of this description describing movement, displacement,rotation, and/or angular displacement; however, unless explicitly statedto the contrary, each example is meant to provide context and not meantto be limiting to the disclosure.

For example, translation in the x-axis may be referred to as movingright or moving left. However, it will be understood that this may alsobe considered equivalent to moving from the origin—positive (right) ornegative (left)—in the lateral axis. Rotation (angular displacement)about the x-axis may be referred to as rotating up or down. However, itwill be understood that this may also be considered equivalent to pitchup or down. Thus, for example, moving right while rotating up will beunderstood as moving from the origin toward positive values in thelateral axis while pitching up.

Translation in the y-axis may be referred to as moving forward orbackward. However, it will be understood that this may also beconsidered equivalent to moving from the origin—positive (forward) ornegative (backward)—in the longitudinal axis. Rotation (angulardisplacement) about the y-axis may be referred to as tilting left orright. However, it will be understood that this may also be consideredequivalent to roll left (counter-clock wise) or right (clock-wise).Thus, for example, moving forward while tilting left will be understoodas moving from the origin toward positive values in the longitudinalaxis while rolling left.

Translation in the z-axis may be referred to as moving up or down.However, this may also be considered equivalent to moving from theorigin—positive (up) or negative (down)—in the vertical axis. Rotation(angular displacement) about the z-axis may be referred to as turningleft or right. However, it will be understood that this may also beconsidered equivalent to yaw left or right. Thus, for example, moving upwhile turning left will be understood as moving from the origin towardpositive values in the vertical axis while yawing left.

Having described various embodiments of the disclosure, an exemplarycomputing environment suitable for implementing embodiments of thedisclosure is now described. With reference to FIG. 10, an exemplarycomputing device is provided and referred to generally as computingdevice 1000. The computing device 1000 is but one example of a suitablecomputing environment and is not intended to suggest any limitation asto the scope of use or functionality of the disclosure. Neither shouldthe computing device 1000 be interpreted as having any dependency orrequirement relating to any one or combination of componentsillustrated.

Embodiments of the disclosure may be described in the general context ofcomputer code or machine-useable instructions, includingcomputer-useable or computer-executable instructions, such as programmodules, being executed by a computer or other machine, such as apersonal data assistant, a smartphone, a tablet PC, or other handhelddevice. Generally, program modules, including routines, programs,objects, components, data structures, and the like, refer to code thatperforms particular tasks or implements particular abstract data types.Embodiments of the disclosure may be practiced in a variety of systemconfigurations, including handheld devices, consumer electronics,general-purpose computers, more specialty computing devices, etc.Embodiments of the disclosure may also be practiced in distributedcomputing environments where tasks are performed by remote-processingdevices that are linked through a communications network. In adistributed computing environment, program modules may be located inboth local and remote computer storage media including memory storagedevices.

With reference to FIG. 10, computing device 1000 includes a bus 1010that directly or indirectly couples the following devices: memory 1012,one or more processors 1014, one or more presentation components 1016,one or more input/output (I/O) ports 1018, one or more I/O components1020, and an illustrative power supply 1022. Bus 1010 represents whatmay be one or more busses (such as an address bus, data bus, orcombination thereof). Although the various blocks of FIG. 10 are shownwith lines for the sake of clarity, in reality, these blocks representlogical, not necessarily actual, components. For example, one mayconsider a presentation component such as a display device to be an I/Ocomponent. Also, processors have memory, so the memory 1012 and the oneor more processors 1014 may or may not comprise separate or distinctcomponents. The inventors hereof recognize that such is the nature ofthe art and reiterate that the diagram of FIG. 10 is merely illustrativeof an exemplary computing device that can be used in connection with oneor more embodiments of the present disclosure. Distinction is not madebetween such categories as “workstation,” “server,” “laptop,” “handhelddevice,” etc., as all are contemplated within the scope of FIG. 10 andwith reference to “computing device.”

Computing device 1000 typically includes a variety of computer-readablemedia. Computer-readable media can be any available media that can beaccessed by computing device 1000 and include both volatile andnonvolatile media, removable and non-removable media. By way of example,and not limitation, computer-readable media may comprise computerstorage media and communication media. Computer storage media includeboth volatile and nonvolatile, removable and non-removable mediaimplemented in any method or technology for storage of information suchas computer-readable instructions, data structures, program modules, orother data. Computer storage media includes, but is not limited to, RAM,ROM, EEPROM, flash memory or other memory technology, CD-ROM, digitalversatile disks (DVDs) or other optical disk storage, magneticcassettes, magnetic tape, magnetic disk storage or other magneticstorage devices, or any other medium which can be used to store thedesired information and which can be accessed by computing device 1000.Computer storage media does not comprise signals per se. Communicationmedia typically embodies computer-readable instructions, datastructures, program modules, or other data in a modulated data signalsuch as a carrier wave or other transport mechanism and includes anyinformation delivery media. The term “modulated data signal” means asignal that has one or more of its characteristics set or changed insuch a manner as to encode information in the signal. By way of example,and not limitation, communication media include wired media, such as awired network or direct-wired connection, and wireless media, such asacoustic, RF, infrared, and other wireless media. Combinations of any ofthe above should also be included within the scope of computer-readablemedia.

Memory 1012 includes computer storage media in the form of volatileand/or nonvolatile memory. The memory may be removable, non-removable,or a combination thereof. Exemplary hardware devices include solid-statememory, hard drives, optical-disc drives, and the like. Computing device1000 includes one or more processors 1014 that read data from variousentities such as memory 1012 or I/O components 1020. Presentationcomponent(s) 1016 presents data indications to a user or other device.Exemplary presentation components include a display device, speaker,printing component, vibrating component, and the like.

The I/O ports 1018 allow computing device 1000 to be logically coupledto other devices, including I/O components 1020, some of which may bebuilt in. Illustrative components include a microphone, joystick, gamepad, satellite dish, scanner, printer, wireless device, etc. The I/Ocomponents 1020 may provide a natural user interface (NUI) thatprocesses air gestures, voice, or other physiological inputs generatedby a user. In some instances, inputs may be transmitted to anappropriate network element for further processing. An NUI may implementany combination of speech recognition, touch and stylus recognition,facial recognition, biometric recognition, gesture recognition both onscreen and adjacent to the screen, air gestures, head and eye tracking,and touch recognition associated with displays on the computing device1000. The computing device 1000 may be equipped with depth cameras, suchas stereoscopic camera systems, infrared camera systems, RGB camerasystems, and combinations of these, for gesture detection andrecognition. Additionally, the computing device 600 may be equipped withaccelerometers or gyroscopes that enable detection of motion. The outputof the accelerometers or gyroscopes may be provided to the display ofthe computing device 1000 to render immersive augmented reality orvirtual reality.

Some embodiments of computing device 1000 may include one or moreradio(s) 1024 (or similar wireless communication components). The radio1024 transmits and receives radio or wireless communications. Thecomputing device 1000 may be a wireless terminal adapted to receivecommunications and media over various wireless networks. Computingdevice 1000 may communicate via wireless protocols, such as codedivision multiple access (“CDMA”), global system for mobiles (“GSM”), ortime division multiple access (“TDMA”), as well as others, tocommunicate with other devices. The radio communications may be ashort-range connection, a long-range connection, or a combination ofboth a short-range and a long-range wireless telecommunicationsconnection. When we refer to “short” and “long” types of connections, wedo not mean to refer to the spatial relation between two devices.Instead, we are generally referring to short range and long range asdifferent categories, or types, of connections (i.e., a primaryconnection and a secondary connection). A short-range connection mayinclude, by way of example and not limitation, a Wi-Fi® connection to adevice (e.g., mobile hotspot) that provides access to a wirelesscommunications network, such as a WLAN connection using the 802.11protocol; a Bluetooth connection to another computing device is a secondexample of a short-range connection, or a near-field communicationconnection. A long-range connection may include a connection using, byway of example and not limitation, one or more of CDMA, GPRS, GSM, TDMA,and 802.16 protocols.

Many different arrangements of the various components depicted, as wellas components not shown, are possible without departing from the scopeof the claims below. Embodiments of the present disclosure have beendescribed with the intent to be illustrative rather than restrictive.Alternative embodiments will become apparent to readers of thisdisclosure after and because of reading it. Alternative means ofimplementing the aforementioned can be completed without departing fromthe scope of the claims below. Certain features and sub-combinations areof utility, may be employed without reference to other features andsub-combinations, and are contemplated within the scope of the claims.

What is claimed is:
 1. A computer-implemented method for hands-freenavigation of a head-mounted computing device, the method comprising:initializing, by the head-mounted computing device (HMD), a hands-freeinteraction mode, wherein the hands-free interaction mode enableshands-free interaction with a user interface of a touch-based operatingsystem of the HMD; based on the hands-free interaction mode beinginitialized, detecting, by the HMD, an initial position of thehead-mounted computing device based on sensor data received from a setof sensors coupled to the HMD; based on the initial position beingdetected, displaying, by the HMD, a first instance of a user interfaceof the touch-based operating system on a display of the head-mountedcomputing device, the first instance of the user interface beingdisplayed while the HMD is in the detected initial position;determining, by the HMD, that a first displacement of the HMD is greaterthan a defined first threshold displacement relative to the detectedinitial position, wherein the first displacement is determined based onadditional sensor data received from the set of sensors; converting, bythe HMD, the first displacement to a corresponding set of touch-basedinputs for communication to the touch-based operating system based onthe determination that the first displacement is greater than thedefined first threshold displacement.
 2. The computer-implemented methodof claim 1, further comprising receiving a first audible inputassociated with the user interface of the touch-based operating systemand converting the first audible input to another corresponding set oftouch-based inputs.
 3. The computer-implemented method of claim 1,wherein the user interface is associated with an electronic document inthe touch-based operating system.
 4. The computer-implemented method ofclaim 2, wherein the set of touch-based inputs comprises a scrollinginstruction having a fixed number of scroll units.
 5. Thecomputer-implemented method of claim 1, wherein the defined firstthreshold displacement corresponds to a minimum angular displacement ofthe head-mounted computing device relative to the initial position. 6.The computer-implemented method of claim 1, wherein the set of sensorscomprise at least one of a camera, accelerometer, gyroscope,magnetometer first displacement is detected by one or more sensors ofthe head-mounted computing device.
 7. The computer-implemented method ofclaim 1, wherein detecting the first displacement comprises determininga duration of the first displacement.
 8. The computer-implemented methodof claim 1, further comprising displaying, by the HMD, a second instanceof the user interface of the touch-based operating system on the displayof the head-mounted computing device in response to the converted firstdisplacement.
 9. The computer-implemented method of claim 8, furthercomprising: detecting, by the HMD, a second displacement of thehead-mounted computing device, the second displacement being above adefined second threshold displacement; converting, by the HMD, a secondinstruction based on the detected second displacement, wherein thesecond instruction corresponds to the one or more touch-based inputs;and displaying, by the HMD, a third instance of the user interface ofthe touch-based operating system on the display of the head-mountedcomputing device.
 10. A system for hands-free navigation of ahead-mounted computing device (HMD), the system comprising: one or moreprocessors; and one or more computer storage media storingcomputer-useable instructions that, when executed by the one or moreprocessors, implement a method comprising: initializing a hands-freeinteraction mode, wherein the hands-free interaction mode enableshand-free interaction with a user interface of a touch-based operatingsystem of the HMD; displaying a first instance of a user interface ofthe touch-based operating system on a display of the HMD; detecting,while the first instance of the user interface is being displayed, afirst hands-free input comprising one or more of: a first displacementof the head-mounted computing device based on sensor data received froma set of sensors coupled to the HMD, the first displacement being abovea defined threshold displacement, or a first audible input correspondingto a touch-based control dialogue included in the displayed firstinstance of the user interface; converting the detected first hands-freeinput to a corresponding set of touch-based inputs for communication tothe touch-based operating system; and displaying a second instance ofthe user interface of the touch-based operating system on the display ofthe HMD.
 11. The system of claim 10, wherein the first hands-free inputcomprises the first displacement and the first audible input.
 12. Thesystem of claim 10, wherein the implemented method further comprises:detecting a second hands-free input; determining a second instructionbased on the second hands-free input, wherein the second instructioncorresponds to the one or more touch-based inputs; and displaying athird instance of the user interface of the touch-based operating systemon the display of the head-mounted computing device.
 13. The system ofclaim 10, wherein the implemented method further comprises detecting ahands-free initialization input and generating an instruction toinitialize the hands-free interaction mode on the head-mounted computingdevice.